Was going to do a long and rambling blog this evening, but have run out of time; so will have to do a fairly quick 'Mystery Object', two photographs of which are shown. The upper photo shows the whole object (it is one foot, three inches in length, although I have seen even longer ones). They were made for a quite specific purpose, I'm told. The lower photograph shows the mechanism of the device. Please have a guess at where they were made, roughly when, and the 'quite specific' purpose for which they were made.
Will now stagger off to bed, so Goodnight to all, if any, readers.